N-th member of arithmetical progression

Members of of an arithmetical progression and arithmetic average

Sum of the members of an arithmetic progression (arithmetic series)

Sum of the members of an arithmetic progression (arithmetic series)

N-th member of geometric progression

Members of geometric progression and geometric average

Sum of the members of geometric progression (geometric series)

Sum of the members of geometric progression (geometric series)

Sum of an infinite geometric progression (infinite geometric series)

Find
It is known that:

=

Members of of an arithmetical progression and arithmetic average

Find
It is known that:

=

Sum of the members of an arithmetic progression (arithmetic series)

Find
It is known that:

=

Sum of the members of an arithmetic progression (arithmetic series)

Find
It is known that:

=

N-th member of geometric progression

Find
It is known that:

=

Members of geometric progression and geometric average

Find
It is known that:

=

Sum of the members of geometric progression (geometric series)

Find
It is known that:

=

Sum of the members of geometric progression (geometric series)

Find
It is known that:

=

Sum of an infinite geometric progression (infinite geometric series)

Find
It is known that:

=